D. mantel and wall projections – Hearth and Home Technologies GDST3831I User Manual
Page 20

Heatilator • GDST3831I • 2127-900 Rev. F • 10/08
20
D. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clear-
ances as specifi ed. Framing or fi nishing material closer than
the minimums listed must be constructed entirely of noncom-
bustible materials (i.e., steel studs, concrete board, etc).
Note: All
measurements
in inches.
Note: Clearance from opening to
perpendicular wall.
Figure 5.6 Non-Combustible Zone
Figure 5.5 Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
SHEETROCK
AIR SPACE REQUIRED
3.5 in.
5
6
7
8
9
10
3
4
5
12
11
10
9
8
7
6
TOP OF HOOD OR FIREPLACE OPENING
MIN.
MAX.
4
12
13
11
32
CEILING
TOP VIEW
3-1/4 in.
Min.
1/2 in.
Min.
Unlimited
FIREPLACE
OPENING
Figure 5.3 Minimum Vertical and Maximum Horizontal
Dimensions of Combustibles
Figure 5.4 Minimum Vertical and Maximum Horizontal
Dimensions of Non-Combustibles
Note: All
measurements
in inches.
5
6
7
8
14
TOP OF HOOD OR FIREPLACE OPENING
MIN.
4
5
12
18
11
10
9
8
7
6
MAX.
2
3
1
32
CEILING
4
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